gcp_project_id = attribute(:gcp_project_id, default: '<%= external_attribute(pwd, 'gcp_project_id') -%>', description: 'The GCP project identifier.')
gcp_location = attribute(:gcp_location, default: '<%= external_attribute(pwd, 'gcp_location') -%>', description: 'The GCP project location.')
gcp_db_instance_name = attribute(:gcp_db_instance_name, default: '<%= external_attribute(pwd, 'gcp_db_instance_name') -%>', description: 'Database instance name.')